Rotary pump.



PATENTED MAY v26, 1908.

J. MLLER.

ROTARYPUMP. APPLICATION FILED rms. 2a, 1906.

UNITED STATES PATENT oEEioE.

JACOB MLLER, OF NEW YORK, N. Y., vASSIGNOR TO CAROLINEH. MLLER, F NEW YORK, N. Y.

Bomans PUMP.

Specification of Letters' Patent.

Patented my 2c, isos.

' Application iledl February 20, 1900. Serial No. 303,497. l

ment ofthe abutments in the pump-cylinder' or by replacing the same from time to time cylinder of my improved rotary pump. Thel with new abutments; and for this purpose the invention consists of a. rotary pump which comprises a stationary pump-cylinder rovided with abutments that decrease in thickness from the center towards the ends, said abutments being provided with openings atv both sides of the center-portion of greatest thickness, for the inlet and outlet of the liquid, a cylindrical piston rotating in the pump-cylinder and provided with radiallyuided wings, and a central actuating-piece aving depressions at opposite sides corresponding to the central portions of the abutments, said actuatingiece being attached to the. end of the cylin er.

The invention consists further of certain details of construction and combinations of parts which will be lfully described hereinafter and finally pointed out in the claim. In the accom/panying drawing, Figure 1 represents a vertical transversesection of my improved rotary pump taken `on line 1-1,

Fig. 2, and Fig. 2 is avertical longitudinal section on line`2-2, Fig. 1. Similar letters of reference indicate correspending-parts in the two figures of the draw'- ing.. e A

Referring Ato the drawing, a represents the cylinder a is supported stational'gyT on fa suit- -the c osed end be' able' edestal b and' made closed at one end,

provided with a closedbearing for the en of the rotary shaft s.' The cylinder ais provided at its opposite side with a circumferential flange al, to which is attached the detachable head b of the cylinder by means of screw-bolts b1. The head b is provided with a central o ening for the shaft s and with a stuling-box 2forthe same. The stationary cylinder a is provided with abutment-receiving recesses at its interior,

which are arranged symmetrical to the ver-4 center-plane of the cylin-` tical longitudina der. Above the'horizontal centerplane of the cylinder a are arranged, equidistantly,

res ectively inlet andoutlet opem-ngs o, ol

an short connecting-'pipes p, p1 which are Y preferably castintegrally with the cylinder, 'One'pair of o enings and pipes at each side of the same. is attached, at the interior of the same, a stationary actuating-member m which is provided with rounded-off ends and depressions between said ends, as shown in Fig. 2, the i longer axis of said actuating-member being ,in hne with the vertical center-plane ofthe cylinder a, while the centers of the depifesslons are in line with the horizontal plane of the same. l l

Into the recesses at the interior of the cyllinder a, are inserted abutmentsd, which taper from the thick portions at the center to'- o the closed end of the cylinder v wards the ends, the centers of the thick porr- Y tions being in line with the horizontal centerplane of the cylinder a. l tions of 'the abutments are provided with transverse grooves on the sides adjacent to the cylinder so as to it on keys d1 which are inserted in transverse grooves in the recesses at the interior of the cylinder, so that theabutments', when they are inserted 1n the cylinder from the open side of the same, are

The center-porguided on the keys and on the shouldersv rmed at the upper and lower portions of the cylinder a. Actlng on the keys d1 are two set-screws d which pass through the c linder a, and which serve for adjusting thel 'e s and the abutments for taking up the slig t sey wearof thev latter. The abutments are provided, equidistantly from the center-plane of the cylinder, with openings or ports o2, 03

that register with the openings o, o1 they cylinder;

IntoV the cylinder a. is inserted, Vfrom Athe v openend of the same, a piston e, the outer diameter of which is equal to the 'distance 'between the center-portions of the abutments d, said. piston being of cylindrical shape, open at one andclosed at the other. end, the closed end. being provided with a hub el that iss lined onto the shaft s and rotated therewit The cylindrical piston e 1s reinforced by interior radial ribs e2 and provided with equidistant openings intermedlately between said ribs e, and guide-pieces e for radial wings w which are rounded oi at.

their outer and inner ends, said wings being guided in recesses of the end-wall of the pistact with the outer surface of the stationary actuating-member fm, 'when the piston is rotated by power applied to tie shaft .si

When the piston is moving in the direc-tion of the arrow shown in Fig. 2, the liquid of the pump is drawn through the upper left-hand ports o, o2 by the action of one of thewings w and pushed by the next following wing w as soon as the same asses the left-hand abutment d, through tile outlet-'ports o, o2 at the upper right-hand side of the cylinder, while simultaneousl the liquid is drawn through the lower rig t-hand .ports o1, o3, into the lower part of the cylinder, and forced by the piston to the outside, producing lthereby an eective double action of the pump. When the direction of the motion is reversed, the upper lefthand ports o, o2 and the lower lefthand ports 02, o3, o1 serve as the inlet-ports, while the u per left-hand ports o, o2 and the lower rightand ports o1, o3 serve as the outletgports respectively.

hen the abutments of the cylinder or the` radial wings of the iston commence to wear out, the wear is ta en u by adjusting the abutments by means of tie set-screws d2, so that a reliable and tight contact between the inner surface of the abutments and the outer ends of the Wings w is'l always obtained.I When the wear of the piston beconiestoo great, so as to affect the function of the pump, a new piston may be inserted, or when the wear is in the abutments', new abutments may be inserted in the cylinder. This can be readily accomplished by removing the head of the pump, and then removing the piston with its sha-ts, so that the cylin.- der is in condition for inserting new abutments. In case the stationary actuatingmember fm shows considerable wear, a new member may be readily inserted and attached to the closed end of the cylinder a. Therefore, any repairs whichare necessary on account of the wear of the parts of the rotary pump, can be readily made in a quick and easy manner, so that the main objection to rotary pum s, viz., the difficulty in keeping all the wor ing arts in tight fit, is overcome, and a very eificient rotary pump obtained.

It is obvious that the rotary pump ma also be worked as a rotary engine, if desire in which case the expansive force of the steam applied to the spaces between the cylinder, piston and the radial wings is made use of for imparting rotarymotion to the shaft.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

In a rotary pump, the combination of a cylinder provided interiorly at opposite sides with abutment-receiving recesses, there being transverse grooves in the cylinder-wall at the middle parts of said recesses, abutmonts seated in said recesses and having transverse grooves in their outer surfaces opposite the transverse grooves in the cylinder-wall, keys interposed between the abutments and the cylinder-wall in the o posing transverse grooves, said abutments eing guided on said keys and slidable thereon into and out of the cylinder, set-screws threaded in the cylinderwall and abutting against said keys, a piston within the cylinder having wings to coperate with said abutments, and actuating mechanism for the win s.

In testimony, that I c aim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

JACOB MLLER.

`Witnesses:

PAUL GOEPEL, HENRY J. SUHRBIER. 

